add new minimumVersion setting in saves, can restrict the smallest version of TPT that is able to open the save. Uses major/minor version for this

Also add RESTRICTVERSION macro to help when adding restrictions later
Also show errors when opening broken stamps now too

src/client/Client.cpp

@@ -1094,6 +1094,7 @@ SaveFile * Client::GetStamp(std::string stampID)
 		catch (ParseException & e)
 		{
 			std::cerr << "Client: Invalid stamp file, " << stampID << " " << std::string(e.what()) << std::endl;
+			file->SetLoadingError(e.what());
 		}
 	}
 	return file;

src/client/GameSave.cpp

@@ -466,7 +466,7 @@ void GameSave::readOPS(char * data, int dataLength)
 	if (savedVersion > SAVE_VERSION)
 	{
 		fromNewerVersion = true;
-		throw ParseException(ParseException::WrongVersion, "Save from newer version");
+		//throw ParseException(ParseException::WrongVersion, "Save from newer version");
 	}
 
 	//Incompatible cell size
@@ -721,6 +721,37 @@ void GameSave::readOPS(char * data, int dataLength)
 				}
 			}
 		}
+		else if (!strcmp(bson_iterator_key(&iter), "minimumVersion"))
+		{
+			if (bson_iterator_type(&iter) == BSON_OBJECT)
+			{
+				int major = INT_MAX, minor = INT_MAX;
+				bson_iterator subiter;
+				bson_iterator_subiterator(&iter, &subiter);
+				while (bson_iterator_next(&subiter))
+				{
+					if (bson_iterator_type(&subiter) == BSON_INT)
+					{
+						if (!strcmp(bson_iterator_key(&subiter), "major"))
+							major = bson_iterator_int(&subiter);
+						else if (!strcmp(bson_iterator_key(&subiter), "minor"))
+							minor = bson_iterator_int(&subiter);
+						else
+							fprintf(stderr, "Wrong type for %s\n", bson_iterator_key(&iter));
+					}
+				}
+				if (major > SAVE_VERSION || (major == SAVE_VERSION && minor > MINOR_VERSION))
+				{
+					std::stringstream errorMessage;
+					errorMessage << "Save from a newer version: Requires version " << major << "." << minor;
+					throw ParseException(ParseException::WrongVersion, errorMessage.str());
+				}
+			}
+			else
+			{
+				fprintf(stderr, "Wrong type for %s\n", bson_iterator_key(&iter));
+			}
+		}
 	}
 
 	//Read wall and fan data
@@ -1783,6 +1814,12 @@ void GameSave::readPSv(char * data, int dataLength)
 	}
 }
 
+// restrict the minimum version this save can be opened with
+#define RESTRICTVERSION(major, minor) if ((major) > minimumMajorVersion || (((major) == minimumMajorVersion && (minor) > minimumMinorVersion))) {\
+	minimumMajorVersion = major;\
+	minimumMinorVersion = minor;\
+}
+
 char * GameSave::serialiseOPS(unsigned int & dataLength)
 {
 	//Particle *particles = sim->parts;
@@ -1794,6 +1831,10 @@ char * GameSave::serialiseOPS(unsigned int & dataLength)
 	int blockX, blockY, blockW, blockH, fullX, fullY, fullW, fullH;
 	int x, y, i, wallDataFound = 0;
 	int posCount, signsCount;
+	// minimum version this save is compatible with
+	// when building, this number may be increased depending on what elements are used
+	// or what properties are detected
+	int minimumMajorVersion = 90, minimumMinorVersion = 2;
 	bson b;
 
 	std::fill(elementCount, elementCount+PT_NUM, 0);
@@ -2117,6 +2158,10 @@ char * GameSave::serialiseOPS(unsigned int & dataLength)
 	bson_append_string(&b, "platform", IDENT_PLATFORM);
 	bson_append_string(&b, "builtType", IDENT_BUILD);
 	bson_append_finish_object(&b);
+	bson_append_start_object(&b, "minimumVersion");
+	bson_append_int(&b, "major", minimumMajorVersion);
+	bson_append_int(&b, "minor", minimumMinorVersion);
+	bson_append_finish_object(&b);
 	
 
 	bson_append_bool(&b, "waterEEnabled", waterEEnabled);

src/client/SaveFile.cpp

@@ -7,11 +7,12 @@ SaveFile::SaveFile(SaveFile & save):
 	thumbnail(NULL),
 	gameSave(NULL),
 	filename(save.filename),
-	displayName(save.displayName)
+	displayName(save.displayName),
+	loadingError(save.loadingError)
 {
-	if(save.gameSave)
+	if (save.gameSave)
 		gameSave = new GameSave(*save.gameSave);
-	if(save.thumbnail)
+	if (save.thumbnail)
 		thumbnail = new Thumbnail(*save.thumbnail);
 }
 
@@ -29,7 +30,8 @@ SaveFile::SaveFile(std::string filename):
 	thumbnail(NULL),
 	gameSave(NULL),
 	filename(filename),
-	displayName(filename)
+	displayName(filename),
+	loadingError("")
 {
 
 }
@@ -64,6 +66,16 @@ void SaveFile::SetDisplayName(std::string displayName)
 	this->displayName = displayName;
 }
 
+std::string SaveFile::GetError()
+{
+	return loadingError;
+}
+
+void SaveFile::SetLoadingError(std::string error)
+{
+	loadingError = error;
+}
+
 SaveFile::~SaveFile() {
 	delete gameSave;
 	delete thumbnail;

src/client/SaveFile.h

@@ -19,6 +19,8 @@ public:
 	void SetDisplayName(std::string displayName);
 	std::string GetName();
 	void SetFileName(std::string fileName);
+	std::string GetError();
+	void SetLoadingError(std::string error);
 
 	virtual ~SaveFile();
 private:
@@ -26,6 +28,7 @@ private:
 	GameSave * gameSave;
 	std::string filename;
 	std::string displayName;
+	std::string loadingError;
 };
 
 #endif /* SAVEFILE_H_ */

src/gui/game/GameController.cpp

@@ -110,11 +110,14 @@ public:
 	StampsCallback(GameController * cc_) { cc = cc_; }
 	virtual void ControllerExit()
 	{
-		if(cc->localBrowser->GetSave())
+		SaveFile *file = cc->localBrowser->GetSave();
+		if (file)
 		{
-			if (cc->localBrowser->GetMoveToFront())
-				Client::Ref().MoveStampToFront(cc->localBrowser->GetSave()->GetName());
-			cc->LoadStamp(cc->localBrowser->GetSave()->GetGameSave());
+			if (file->GetError().length())
+				new ErrorMessage("Error loading stamp", file->GetError());
+			else if (cc->localBrowser->GetMoveToFront())
+				Client::Ref().MoveStampToFront(file->GetName());
+			cc->LoadStamp(file->GetGameSave());
 		}
 	}
 };